Why does sepsis cause generalised weakness?

Fighting a major infection uses energy and may bring fever, poor sleep, dehydration and reduced food intake. Changes in circulation can also mean muscles and organs are not working as efficiently. The result may be a heavy-limbed feeling, exhaustion, unsteadiness or difficulty completing usual tasks. Generalised Weakness is a common presentation of Sepsis; it does not identify sepsis by itself because many other problems can cause weakness.

If weakness starts during an infection, stay with the person if possible and check whether they can speak clearly, drink safely, stand safely and pass urine. Help prevent falls by avoiding stairs or walking alone when unsteady. Offer small amounts of fluid only if swallowing is safe. Contact a clinician promptly for a new or worsening decline, since assessment may include observations, examination and tests to find the infection and judge its effects.

Get emergency medical help now if weakness is sudden or severe, or comes with confusion, fainting, difficult breathing, chest discomfort, blue or mottled skin, a seizure, or very little urine. Call urgently if someone with a suspected infection cannot get up, becomes hard to wake, or deteriorates over a short time. Do not drive an acutely unwell person yourself if emergency transport is available.

Ask whether the weakness could reflect dehydration, low blood pressure, an infection-related complication or another cause. Ask what activity is safe, what fluids or foods are appropriate, and which new symptoms should trigger emergency care after leaving the clinic.